US1581262A - Channeled insert for concrete ceilings - Google Patents

Description

JV. F. ZAE$RKIE CHANNELED INSERT FOR CONCRETE CEILINGS Filed March 26, 1923 f t. Z T n M H m .a Z 2 Ma W 35% mm A a/4. WWW

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Patented Apr. 20,

barren STATES PATENT ()FFICE.

wrrtrarvr r. ZABRISKIE, or nnrnorn'mrcnrean, assrenoa TO GABRIEL STEEL GON- PANY, or :on'rnorr, MICHIGAN, A conPonA'rroN or'rvrrcnrsa v.

GHANN'ELED INSERT FOR CONCRETE CEILINGS.

Applicationfiledll'iarch 26, 1923. Serial No.-'62 7,863.

To all whom it may concern:

Be it known that I, WILLIAM F. ZABRISKIE, a citizen of the United States of America, residing at Detroit, in the county of lVayne and State of Michigainhave invented certain new and useful Improvements in Chan-v neled Inserts for Concrete Ceilings, of which the following is a specification, reference being had therein to the accompanying drawings.

Theinvention relates to channeled inserts for concrete ceilings being more particularly .lesigned for the support of hangers from said ceilings and for the easy engagement and disengagement of the same.

In the present state of the art various constructions of channeled inserts have been devised in which the channel member is inwardly flanged to engage the head of the bolt or other securing means for the hanger, said channel member being itself supported by anchoring arms which are embedded in the concrete. In some of these prior constructions the channel member is formed from pressed sheet metal, while in others it is formed from rolled bars. The defect of the sheet metal construction is the lack of strength, particularly in the flanges which directly support the hanger.- On the other hand, where rolled bars are employed, it is difficult to obtain a channel closed at the top and suitably anchored in the body of con crete.

With the present construction I have overcome the difficulties in the use of rolled bars by employing as units in my construction rolled. channel bars having the parallel flanges or legs of unequalilength. The permits of abutting the longer flanges to form a closed top for the channel, while the shorter flanges will be spaced from each other to provide the desired slot for the hanger supports. I have also devised a simple and strong anchor connection which may be quickly applied and is so located as to be favorable for transmitting the stresses into the concrete body. The invention therefore consists in the above mentioned and other features of construction as hereinafter set forth. I

In the drawings:

Figure 1 is a perspective view showing a short section of the insert with one of its supporting anchor arms; I

Figure 2 is a vertical longitudinal section;

Figure 3 is a cross-section.

A and A are like rolled channel bars having the short flanges B and the long. flanges C on opposite sides thereof. At one or more points in the'length of the bar the flanges B are cut away as indicated at Dtoprovide an entrance, aperture for the hanger. The bars A and A are assembled by abutting the edges of the long flanges C thereof and then by securing the same together either by welding, as indicated at E, or in any other suitable manner. channel barare preferablyformed of returnbent flat bars F which embrace the sides of the channels A and A and are preferably se cured thereto'in the following manner:

The end portions of the bars F are punched with elongated apertures G therein and are then welded to the sides or webs of the channel members A and A by filling in the elongated apertures with molten metal. This metal is fused into the web of the channel as well as the edges of the slot so as to form in effect an integral stud of suflicient cross section to withstand the shearing stress thereon.

The advantage of thus attaching the anchors is that the cross section of the members F is maintained of sufficient area for strength by reason of the narrow slot, while the depth of the slot is suflicient for the required cross-sectional area of the stud. Also the connection. of the anchor directly to the vertical web of the channel is: advantageous as it is more nearly in line with the load. The abutting of the edges of the long flanges not only closes the top of the channel so as to keep out the cement, but also forms a compression member for resisting any turning of the channel members under load.

One of the chief advantages of my improved structure is that the flanges B being rolled into the bars, are of greatest cross section adjacent to the web of the bars so as to impart greater rigidity and strength for supporting the hanger.

hat I claim as my invention is:

1. A channel insert comprising a pair of channel bars each formed with webs and transverse flanges which are longer on one side than the other, the shorter flanges being of greater cross sectional area adjacent said webs than at the inner edges thereof,

The anchor supports for the said bars being arranged with the edges of their longer flanges abutting and aichors secured to the 0 rss.

2. A channel insert comprising a pair of rolled channel bars, each having one of its flanges longer than the other, said bars be ing arranged oppositely with the edges of their longer flanges abutting and secured to each other, and anchor members connecting and embracing said bars and secured thereto.

3. A channel insert comprising a pair of rolled channel bars, each having one of its flanges longer than the other, said bars being arranged With the edges of their longer flanges abutting and Welded to each other, and an anchor member in the form of a return-bent strip embracing said channel members and secured thereto, and spaced at its bend to form a supporting loop.

at. The combination W'th a channel insert, of an anchor therefor comprising a flat bar having an apertured portion lying adjacent to the web of the channel. and a stud Welded to said channel filling said aperture,

5. The combination with a channel insert, of an anchor therefor comprising a flat bar having an elongated slot therein, the slotted portion lying adjacent to the Web of the channel, and a stud Welded to the Web of said channel and filling said aperture.

6. The combination With a structural meniber, of an anchor therefor consisting in a flat bar extending laterally therefrom and provided with an elongated slot therein, the slotted portion of said bar lying adjacent to said structural member, and a stud Welded to said structural member and filling said slot.

'1'. A channel insert comprising a channel bar formed With a Web and a pair of transverse flanges of unequal length, the shorter flange having a greater cross sectional area adjacent said Web than at the inner edge thereof, and a cooperating member against which the longer flange abuts leaving a slot adjacent to the smaller flange.

In testimony whereof I afiix my signature.

lVlLLlAli l F. ZABRISKIE.

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